Barrage du Louet
Barrage du Louet in Hautes-Pyrénées, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.5 m visibility. Phosphorus: 16.5 µg/L. Chlorophyll-a (algae): 3.4 µg/L.
- Clarity
- 2.5 m
Why Barrage du Louet has no A–F grade
Barrage du Louet in France is published with the authority's own measurements, not a LakeQuality letter. official authority class; not a LakeQuality A–F letter Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
A letter on the LakeQuality scale would be an invention, not an official class. Everything below that has been measured is still reported on this page.
Monitoring: the French water agencies, via UNEP GEMS/Water.
Barrage du Louet is a lake in Hautes-Pyrénées County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2022-10-04. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Barrage du Louet
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 8 ft. Phosphorus level: 16.5 µg/L. Chlorophyll-a: 3.4 µg/L. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.45 m | Not graded |
| Phosphorus | 16.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 3.4 µg/L | Not graded |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Barrage du Louet
Compare lakeside cabins, hotels, and vacation rentals near Barrage du Louet in Hautes-Pyrénées, France — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Barrage du Louet
Frequently asked questions about Barrage du Louet
What is the water quality of Barrage du Louet?
- Barrage du Louet in Hautes-Pyrénées, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.5 m visibility. Phosphorus: 16.5 µg/L. Chlorophyll-a (algae): 3.4 µg/L.
Is Barrage du Louet safe to swim in?
- Barrage du Louet has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.
Explore Barrage du Louet across LakeGrade
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Where this data comes from
48 measurements from 1 monitoring station, 2019–2022. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-20.
Collected and reported by
- Office français de la biodiversité (Hub'Eau)
hubeau-fr48 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
Q0405003
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.